African game reserve poisons horns to prevent poaching
24 April 2013 Last updated at 16:55 BST
A game reserve in South Africa's Western Cape has been using some rather unusual methods to conserve the local rhino population and ensure its cheetahs reproduce.
Along with daily races for the female cheetahs which stimulate their hormones for mating, the reserve's owner injects the horns of three rhinos with a poison which is toxic to humans - but not rhinos - to discourage poachers.
Lu Yang reports.